The amount of a NEDD4-like E3 ubiquitin-protein ligase WWP2 when measured in blood serum. The trait is level of NEDD4-like E3 ubiquitin-protein ligase WWP2 in blood serum (Ontology of Biological Attributes id OBA_2044146). Also known as: blood serum NEDD4-like E3 ubiquitin-protein ligase WWP2 amount.